Abstract:Software-as-a-Service (SaaS) is emerging as a new model of delivering a software, where users utilize software over the internet as a hosted service rather than an installable product. Multi-tenancy is a core concept in SaaS. It is the principle of running a single instance of the software on a server to serve multiple companies (tenants). Re-engineering traditional web applications from scratch into multi-tenancy requires tremendous efforts in terms of cost, manpower, and time. Thus, we provide a framework to migrate traditional web applications into multi-tenant SaaS. The framework provides a detailed overview of the proposed multi-tenant architecture that helps software architects and developers to migrate their applications into multi-tenancy.